Owners Manual
2
S O N A N C E C I N E M A S U B
A C O U S T I C E N C L O S U R E
Installing the Enclosure
Wire Gauge and Quality
The total wire resistance should be less than 10% of the speaker
impedance. The Cinema SUB 10-250 and SUB 12-500 are 8 ohm
drivers so the total wire resistance should be no more than 0.8
ohms.
In simple terms, the extra resistance from the wire will have a very
negative effect on the sound quality of the subwoofer. The sound
can be less dynamic and definition of bass frequencies can be
reduced. Amplifier power is also wasted in the wire, reducing the
maximum output level of the system.
Wire resistance in Ohms vs. length of cable run
Distance in Feet
50' 100' 150' 200' 250' 300'
1.04
.65
.41
.26
.16
.10
18 gauge
16 gauge
14 gauge
12 gauge
10 gauge
20 gauge
2.07
1.30
.82
.52
.32
.20
3.11
1.96
1.22
.77
.49
.31
4.14
2.61
1.63
1.03
.65
.41
5.18
3.26
2.04
1.29
.81
.51
6.22
3.91
2.45
1.55
.97
.61
Connecting the Wire
The SUB 10-250 and 12-500 enclosures feature a unique terminal
system.
As you can see in the illustration below the binding posts are turned
to allow the wire to be run through both binding posts. This is done
to increase contact area and provide the most secure and long
lasting connection possible.
1. Loosens all four binding posts to allow the wire to be pushed
through.
2. Strip off approximately 1-1/4" (32mm) of jacket from the wires.
3. Run the wire through the appropriate terminals.
4. Tighten the binding posts.
5. Tighten the tie wrap around the wires.
1. Determine the proper location for the subwoofer enclosure using
the suggestions on the page 1.
2. Determine the correct height to mount the enclosure. Allow at
least 1" (25mm) around the perimeter of the coverplate for
clearance of the grille frame and grille.
3. Verify the enclosure is level using a bubble level. The grille has a
limited range of adjustment, ensuring the enclosure is level will
greatly simplify the completion of the installation.
4. Attach the box to the stud or joist bay using the supplied wood
screws. Use 4 screws per side on the SUB 10-250 and 6 screws
per side on the SUB 12-500.
5. Drywall should be installed up too the edges of the coverplate.
Do not leave more than a 1/8" (3mm) gap around the perimeter
of the coverplate.